Hello everybody,
This simple MSVC application is loading a MinGW dll and calling a
function which raises an exception.
The 32-bit version of application is catching the exception as expected,
but 64-bit version of application is crashing.
So far my research of the problem goes with no success. I could only
prevent it from crash by removing SEH functions, adding
-fomit-frame-pointer to mingw command-line for dll, and use catch(...)
to catch the exception.
Can anyone advise which options to use, or maybe it's not implemented
yet?
---------------------------
32-bit version of the dll compiled using mingw32 with gcc 3.4.5. This
one I got by running the installer: MinGW-5.1.3.exe.
Compile options:
gcc -o mingw_32_library.dll -shared -pipe -mrtd mingw_xx_library.cpp
-mms-bitfields -Wl,--kill-at,-s
---------------------------
64-bit version of the dll compiled using latest mingw-w64 from sf.net,
that is mingw-w64-bin_x86_64-mingw_20080920.
Compile options:
gcc -o mingw_64_library.dll -shared -Wl,-s -pipe -m64
mingw_xx_library.cpp -mms-bitfields
---------------------------
mingw_xx_library.cpp
#include <stdio.h>
extern "C" __declspec(dllexport) void __stdcall
simple_proc_which_throws()
{
printf("simple_proc_which_throws \n");
int* p_int = 0;
*p_int = 1234;
}
---------------------------
Simpletest.cpp -
// compiled using MSVC, console application. Create empty project of
console type, add simpletest.cpp,
// and change Project Properties - C/C++ - Code Generation - Enable C++
Exceptions to /EHa
// leave all other setting with their default values
#include <stdio.h>
#include <windows.h>
#include <eh.h>
void __cdecl SEH_translator_function( unsigned int u,
EXCEPTION_POINTERS* ep )
{
printf("SEH Exception\n\n");
throw 0;
}
int main()
{
#ifdef _WIN64
HMODULE hLibrary = LoadLibrary("mingw_64_library.dll");
#else
HMODULE hLibrary = LoadLibrary("mingw_32_library.dll");
#endif
if(hLibrary == NULL) return 1;
typedef void (__stdcall *simple_proc_t)();
simple_proc_t simple_proc =
(simple_proc_t)GetProcAddress(hLibrary, "simple_proc_which_throws");
if(simple_proc == NULL) return 1;
_se_translator_function old_stf =
_set_se_translator(SEH_translator_function);
try
{
simple_proc();
}
catch(int i)
{
printf("---%d---\n", i);
}
catch(...)
{
printf("---...---\n");
}
_set_se_translator(old_stf);
return 0;
}
Thanks,
Seyran
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